java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/memsafety/lockfree-3.0_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:34:40,065 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:34:40,067 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:34:40,081 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:34:40,081 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:34:40,082 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:34:40,083 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:34:40,085 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:34:40,086 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:34:40,087 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:34:40,088 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:34:40,088 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:34:40,089 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:34:40,091 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:34:40,092 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:34:40,094 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:34:40,096 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:34:40,098 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:34:40,099 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:34:40,100 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:34:40,103 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:34:40,103 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:34:40,103 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:34:40,104 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:34:40,105 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:34:40,106 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:34:40,106 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:34:40,107 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:34:40,107 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:34:40,107 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:34:40,108 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:34:40,108 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-24 23:34:40,118 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:34:40,118 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:34:40,119 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:34:40,119 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:34:40,120 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:34:40,120 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:34:40,120 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:34:40,120 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:34:40,121 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:34:40,121 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:34:40,121 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:34:40,121 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:34:40,122 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:34:40,122 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:34:40,122 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:34:40,122 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:34:40,122 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:34:40,123 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:34:40,123 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:34:40,123 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:34:40,123 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:34:40,123 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:34:40,124 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:34:40,124 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:34:40,124 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:34:40,124 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:34:40,125 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:34:40,125 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:34:40,125 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:34:40,125 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:34:40,125 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:34:40,125 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:34:40,126 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:34:40,126 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:34:40,127 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:34:40,127 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:34:40,160 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:34:40,173 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:34:40,177 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:34:40,179 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:34:40,179 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:34:40,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/lockfree-3.0_true-valid-memsafety.i [2018-01-24 23:34:40,352 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:34:40,357 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:34:40,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:34:40,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:34:40,362 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:34:40,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:34:40" (1/1) ... [2018-01-24 23:34:40,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a76578b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40, skipping insertion in model container [2018-01-24 23:34:40,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:34:40" (1/1) ... [2018-01-24 23:34:40,379 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:34:40,418 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:34:40,541 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:34:40,562 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:34:40,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40 WrapperNode [2018-01-24 23:34:40,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:34:40,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:34:40,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:34:40,573 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:34:40,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40" (1/1) ... [2018-01-24 23:34:40,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40" (1/1) ... [2018-01-24 23:34:40,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40" (1/1) ... [2018-01-24 23:34:40,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40" (1/1) ... [2018-01-24 23:34:40,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40" (1/1) ... [2018-01-24 23:34:40,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40" (1/1) ... [2018-01-24 23:34:40,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40" (1/1) ... [2018-01-24 23:34:40,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:34:40,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:34:40,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:34:40,615 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:34:40,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:34:40,670 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:34:40,670 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:34:40,670 INFO L136 BoogieDeclarations]: Found implementation of procedure push [2018-01-24 23:34:40,670 INFO L136 BoogieDeclarations]: Found implementation of procedure pop [2018-01-24 23:34:40,670 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:34:40,670 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 23:34:40,670 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 23:34:40,671 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:34:40,671 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:34:40,671 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:34:40,671 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:34:40,671 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:34:40,671 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 23:34:40,671 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 23:34:40,671 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:34:40,671 INFO L128 BoogieDeclarations]: Found specification of procedure push [2018-01-24 23:34:40,672 INFO L128 BoogieDeclarations]: Found specification of procedure pop [2018-01-24 23:34:40,672 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:34:40,672 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:34:40,672 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:34:41,032 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:34:41,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:34:41 BoogieIcfgContainer [2018-01-24 23:34:41,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:34:41,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:34:41,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:34:41,036 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:34:41,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:34:40" (1/3) ... [2018-01-24 23:34:41,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa68fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:34:41, skipping insertion in model container [2018-01-24 23:34:41,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:34:40" (2/3) ... [2018-01-24 23:34:41,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa68fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:34:41, skipping insertion in model container [2018-01-24 23:34:41,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:34:41" (3/3) ... [2018-01-24 23:34:41,039 INFO L105 eAbstractionObserver]: Analyzing ICFG lockfree-3.0_true-valid-memsafety.i [2018-01-24 23:34:41,046 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:34:41,055 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2018-01-24 23:34:41,092 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:34:41,093 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:34:41,093 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:34:41,093 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:34:41,093 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:34:41,093 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:34:41,093 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:34:41,093 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:34:41,094 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:34:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2018-01-24 23:34:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-24 23:34:41,116 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:34:41,117 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:34:41,117 INFO L371 AbstractCegarLoop]: === Iteration 1 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:34:41,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1799126466, now seen corresponding path program 1 times [2018-01-24 23:34:41,123 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:34:41,164 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,164 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:34:41,164 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,165 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:34:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:34:41,225 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:34:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:34:41,273 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:34:41,274 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:34:41,274 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:34:41,278 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 23:34:41,293 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 23:34:41,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 23:34:41,296 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 2 states. [2018-01-24 23:34:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:34:41,414 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2018-01-24 23:34:41,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 23:34:41,415 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-01-24 23:34:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:34:41,429 INFO L225 Difference]: With dead ends: 92 [2018-01-24 23:34:41,429 INFO L226 Difference]: Without dead ends: 73 [2018-01-24 23:34:41,432 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 23:34:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-24 23:34:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-01-24 23:34:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-24 23:34:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2018-01-24 23:34:41,470 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 9 [2018-01-24 23:34:41,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:34:41,470 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2018-01-24 23:34:41,470 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 23:34:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2018-01-24 23:34:41,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 23:34:41,471 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:34:41,471 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:34:41,471 INFO L371 AbstractCegarLoop]: === Iteration 2 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:34:41,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1199640283, now seen corresponding path program 1 times [2018-01-24 23:34:41,472 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:34:41,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,473 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:34:41,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,473 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:34:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:34:41,498 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:34:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:34:41,538 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:34:41,538 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:34:41,538 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:34:41,540 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:34:41,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:34:41,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:34:41,541 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 3 states. [2018-01-24 23:34:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:34:41,558 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2018-01-24 23:34:41,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:34:41,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-01-24 23:34:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:34:41,560 INFO L225 Difference]: With dead ends: 87 [2018-01-24 23:34:41,560 INFO L226 Difference]: Without dead ends: 74 [2018-01-24 23:34:41,561 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:34:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-24 23:34:41,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-01-24 23:34:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-24 23:34:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2018-01-24 23:34:41,568 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 12 [2018-01-24 23:34:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:34:41,568 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2018-01-24 23:34:41,568 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:34:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2018-01-24 23:34:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 23:34:41,569 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:34:41,569 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:34:41,569 INFO L371 AbstractCegarLoop]: === Iteration 3 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:34:41,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1201487325, now seen corresponding path program 1 times [2018-01-24 23:34:41,569 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:34:41,570 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,571 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:34:41,571 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,571 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:34:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:34:41,597 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:34:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:34:41,663 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:34:41,664 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:34:41,664 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:34:41,664 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:34:41,664 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:34:41,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:34:41,665 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 3 states. [2018-01-24 23:34:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:34:41,725 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2018-01-24 23:34:41,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:34:41,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-01-24 23:34:41,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:34:41,728 INFO L225 Difference]: With dead ends: 145 [2018-01-24 23:34:41,728 INFO L226 Difference]: Without dead ends: 132 [2018-01-24 23:34:41,728 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:34:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-01-24 23:34:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2018-01-24 23:34:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-01-24 23:34:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 159 transitions. [2018-01-24 23:34:41,747 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 159 transitions. Word has length 12 [2018-01-24 23:34:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:34:41,747 INFO L432 AbstractCegarLoop]: Abstraction has 114 states and 159 transitions. [2018-01-24 23:34:41,747 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:34:41,747 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 159 transitions. [2018-01-24 23:34:41,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:34:41,748 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:34:41,748 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:34:41,749 INFO L371 AbstractCegarLoop]: === Iteration 4 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:34:41,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1408600152, now seen corresponding path program 1 times [2018-01-24 23:34:41,749 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:34:41,750 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,750 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:34:41,750 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,750 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:34:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:34:41,769 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:34:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:34:41,807 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:34:41,808 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:34:41,808 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:34:41,808 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:34:41,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:34:41,809 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:34:41,809 INFO L87 Difference]: Start difference. First operand 114 states and 159 transitions. Second operand 3 states. [2018-01-24 23:34:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:34:41,902 INFO L93 Difference]: Finished difference Result 148 states and 206 transitions. [2018-01-24 23:34:41,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:34:41,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-01-24 23:34:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:34:41,904 INFO L225 Difference]: With dead ends: 148 [2018-01-24 23:34:41,904 INFO L226 Difference]: Without dead ends: 143 [2018-01-24 23:34:41,905 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:34:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-24 23:34:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2018-01-24 23:34:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-01-24 23:34:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 192 transitions. [2018-01-24 23:34:41,921 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 192 transitions. Word has length 13 [2018-01-24 23:34:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:34:41,921 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 192 transitions. [2018-01-24 23:34:41,921 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:34:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 192 transitions. [2018-01-24 23:34:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 23:34:41,921 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:34:41,922 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:34:41,922 INFO L371 AbstractCegarLoop]: === Iteration 5 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:34:41,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1628464921, now seen corresponding path program 1 times [2018-01-24 23:34:41,922 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:34:41,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,923 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:34:41,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:41,923 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:34:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:34:41,938 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:34:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:34:41,995 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:34:41,995 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:34:41,995 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:34:41,995 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:34:41,996 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:34:41,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:34:41,996 INFO L87 Difference]: Start difference. First operand 135 states and 192 transitions. Second operand 5 states. [2018-01-24 23:34:42,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:34:42,089 INFO L93 Difference]: Finished difference Result 385 states and 558 transitions. [2018-01-24 23:34:42,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:34:42,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 23:34:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:34:42,092 INFO L225 Difference]: With dead ends: 385 [2018-01-24 23:34:42,093 INFO L226 Difference]: Without dead ends: 255 [2018-01-24 23:34:42,095 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:34:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-01-24 23:34:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 226. [2018-01-24 23:34:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-01-24 23:34:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 338 transitions. [2018-01-24 23:34:42,121 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 338 transitions. Word has length 15 [2018-01-24 23:34:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:34:42,122 INFO L432 AbstractCegarLoop]: Abstraction has 226 states and 338 transitions. [2018-01-24 23:34:42,122 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:34:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 338 transitions. [2018-01-24 23:34:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:34:42,123 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:34:42,123 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:34:42,123 INFO L371 AbstractCegarLoop]: === Iteration 6 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:34:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1057474006, now seen corresponding path program 1 times [2018-01-24 23:34:42,123 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:34:42,124 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:42,124 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:34:42,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:42,125 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:34:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:34:42,139 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:34:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:34:42,173 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:34:42,173 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:34:42,173 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:34:42,173 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:34:42,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:34:42,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:34:42,174 INFO L87 Difference]: Start difference. First operand 226 states and 338 transitions. Second operand 4 states. [2018-01-24 23:34:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:34:42,323 INFO L93 Difference]: Finished difference Result 392 states and 582 transitions. [2018-01-24 23:34:42,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:34:42,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 23:34:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:34:42,328 INFO L225 Difference]: With dead ends: 392 [2018-01-24 23:34:42,328 INFO L226 Difference]: Without dead ends: 388 [2018-01-24 23:34:42,329 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:34:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2018-01-24 23:34:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 358. [2018-01-24 23:34:42,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-01-24 23:34:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 548 transitions. [2018-01-24 23:34:42,364 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 548 transitions. Word has length 16 [2018-01-24 23:34:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:34:42,364 INFO L432 AbstractCegarLoop]: Abstraction has 358 states and 548 transitions. [2018-01-24 23:34:42,365 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:34:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 548 transitions. [2018-01-24 23:34:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:34:42,366 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:34:42,366 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:34:42,366 INFO L371 AbstractCegarLoop]: === Iteration 7 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:34:42,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1057474005, now seen corresponding path program 1 times [2018-01-24 23:34:42,366 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:34:42,368 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:42,368 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:34:42,368 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:42,368 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:34:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:34:42,385 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:34:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:34:42,439 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:34:42,440 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:34:42,440 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:34:42,440 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:34:42,440 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:34:42,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:34:42,441 INFO L87 Difference]: Start difference. First operand 358 states and 548 transitions. Second operand 4 states. [2018-01-24 23:34:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:34:42,572 INFO L93 Difference]: Finished difference Result 491 states and 729 transitions. [2018-01-24 23:34:42,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:34:42,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 23:34:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:34:42,605 INFO L225 Difference]: With dead ends: 491 [2018-01-24 23:34:42,605 INFO L226 Difference]: Without dead ends: 487 [2018-01-24 23:34:42,606 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:34:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-01-24 23:34:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 460. [2018-01-24 23:34:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-01-24 23:34:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 696 transitions. [2018-01-24 23:34:42,643 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 696 transitions. Word has length 16 [2018-01-24 23:34:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:34:42,644 INFO L432 AbstractCegarLoop]: Abstraction has 460 states and 696 transitions. [2018-01-24 23:34:42,644 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:34:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 696 transitions. [2018-01-24 23:34:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:34:42,646 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:34:42,646 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:34:42,646 INFO L371 AbstractCegarLoop]: === Iteration 8 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:34:42,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1708141764, now seen corresponding path program 1 times [2018-01-24 23:34:42,647 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:34:42,647 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:42,648 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:34:42,648 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:42,648 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:34:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:34:42,662 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:34:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:34:42,705 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:34:42,705 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:34:42,705 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:34:42,706 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:34:42,706 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:34:42,706 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:34:42,706 INFO L87 Difference]: Start difference. First operand 460 states and 696 transitions. Second operand 5 states. [2018-01-24 23:34:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:34:42,826 INFO L93 Difference]: Finished difference Result 1316 states and 1982 transitions. [2018-01-24 23:34:42,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:34:42,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-01-24 23:34:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:34:42,833 INFO L225 Difference]: With dead ends: 1316 [2018-01-24 23:34:42,833 INFO L226 Difference]: Without dead ends: 861 [2018-01-24 23:34:42,836 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:34:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2018-01-24 23:34:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 828. [2018-01-24 23:34:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2018-01-24 23:34:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1196 transitions. [2018-01-24 23:34:42,894 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1196 transitions. Word has length 16 [2018-01-24 23:34:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:34:42,895 INFO L432 AbstractCegarLoop]: Abstraction has 828 states and 1196 transitions. [2018-01-24 23:34:42,895 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:34:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1196 transitions. [2018-01-24 23:34:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 23:34:42,897 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:34:42,897 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:34:42,897 INFO L371 AbstractCegarLoop]: === Iteration 9 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:34:42,897 INFO L82 PathProgramCache]: Analyzing trace with hash 750766986, now seen corresponding path program 1 times [2018-01-24 23:34:42,898 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:34:42,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:42,899 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:34:42,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:34:42,899 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:34:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:34:42,917 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:34:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:34:43,008 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:34:43,008 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:34:43,009 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-01-24 23:34:43,010 INFO L201 CegarAbsIntRunner]: [2], [4], [7], [15], [21], [98], [101], [102], [112], [115], [117], [145], [146], [147], [153], [154], [155], [156], [157] [2018-01-24 23:34:43,060 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:34:43,061 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 23:34:43,301 INFO L262 AbstractInterpreter]: Error location(s) were unreachable [2018-01-24 23:34:43,302 INFO L268 AbstractInterpreter]: Visited 8 different actions 8 times. Never merged. Never widened. Never found a fixpoint. Largest state had 39 variables. [2018-01-24 23:34:43,312 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-01-24 23:34:43,465 INFO L232 lantSequenceWeakener]: Weakened 10 states. On average, predicates are now at 82.63% of their original sizes. [2018-01-24 23:34:43,465 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-01-24 23:34:43,486 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-01-24 23:34:43,487 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-24 23:34:43,487 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-01-24 23:34:43,487 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:34:43,488 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:34:43,488 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:34:43,488 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:34:43,488 INFO L87 Difference]: Start difference. First operand 828 states and 1196 transitions. Second operand 6 states. [2018-01-24 23:35:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:35:35,795 INFO L93 Difference]: Finished difference Result 1710 states and 2487 transitions. [2018-01-24 23:35:35,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:35:35,795 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-01-24 23:35:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:35:35,801 INFO L225 Difference]: With dead ends: 1710 [2018-01-24 23:35:35,801 INFO L226 Difference]: Without dead ends: 887 [2018-01-24 23:35:35,804 INFO L525 BasicCegarLoop]: 2 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:35:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2018-01-24 23:35:35,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 864. [2018-01-24 23:35:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2018-01-24 23:35:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1256 transitions. [2018-01-24 23:35:35,870 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1256 transitions. Word has length 26 [2018-01-24 23:35:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:35:35,871 INFO L432 AbstractCegarLoop]: Abstraction has 864 states and 1256 transitions. [2018-01-24 23:35:35,871 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:35:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1256 transitions. [2018-01-24 23:35:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 23:35:35,872 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:35:35,872 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:35:35,872 INFO L371 AbstractCegarLoop]: === Iteration 10 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:35:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash -938176756, now seen corresponding path program 1 times [2018-01-24 23:35:35,873 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:35:35,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:35:35,874 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:35:35,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:35:35,874 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:35:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:35:35,894 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:35:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:35:35,968 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:35:35,968 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:35:35,968 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-01-24 23:35:35,969 INFO L201 CegarAbsIntRunner]: [2], [4], [7], [9], [15], [21], [98], [101], [102], [112], [115], [117], [145], [146], [147], [153], [154], [155], [156], [157] [2018-01-24 23:35:35,970 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:35:35,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 23:35:36,168 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 23:35:36,169 INFO L268 AbstractInterpreter]: Visited 20 different actions 43 times. Merged at 7 different actions 9 times. Never widened. Found 2 fixpoints after 1 different actions. Largest state had 39 variables. [2018-01-24 23:35:36,173 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 23:35:36,173 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:35:36,174 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 23:35:36,186 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:35:36,186 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 23:35:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:35:36,257 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 23:35:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:35:36,391 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 23:35:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:35:36,664 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:35:36,664 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-24 23:35:36,672 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:35:36,672 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 23:35:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:35:36,788 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 23:35:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:35:36,812 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 23:35:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:35:36,912 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-24 23:35:36,913 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9, 6, 6] total 15 [2018-01-24 23:35:36,913 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-24 23:35:36,913 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 23:35:36,913 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 23:35:36,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-01-24 23:35:36,914 INFO L87 Difference]: Start difference. First operand 864 states and 1256 transitions. Second operand 10 states. [2018-01-24 23:35:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:35:38,029 INFO L93 Difference]: Finished difference Result 2609 states and 4001 transitions. [2018-01-24 23:35:38,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-24 23:35:38,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-01-24 23:35:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:35:38,037 INFO L225 Difference]: With dead ends: 2609 [2018-01-24 23:35:38,038 INFO L226 Difference]: Without dead ends: 1786 [2018-01-24 23:35:38,040 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2018-01-24 23:35:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2018-01-24 23:35:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1584. [2018-01-24 23:35:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1584 states. [2018-01-24 23:35:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2296 transitions. [2018-01-24 23:35:38,120 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2296 transitions. Word has length 26 [2018-01-24 23:35:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:35:38,120 INFO L432 AbstractCegarLoop]: Abstraction has 1584 states and 2296 transitions. [2018-01-24 23:35:38,120 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 23:35:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2296 transitions. [2018-01-24 23:35:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 23:35:38,121 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:35:38,122 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:35:38,122 INFO L371 AbstractCegarLoop]: === Iteration 11 === [popErr2RequiresViolation, popErr5RequiresViolation, popErr4RequiresViolation, popErr3RequiresViolation, popErr0RequiresViolation, popErr1RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, pushErr5RequiresViolation, pushErr3RequiresViolation, pushErr0RequiresViolation, pushErr1RequiresViolation, pushErr7RequiresViolation, pushErr6RequiresViolation, pushErr2RequiresViolation, pushErr4RequiresViolation]=== [2018-01-24 23:35:38,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1524460851, now seen corresponding path program 1 times [2018-01-24 23:35:38,122 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:35:38,123 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:35:38,123 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:35:38,123 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:35:38,124 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:35:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:35:38,138 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:35:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:35:38,359 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:35:38,359 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:35:38,359 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-01-24 23:35:38,359 INFO L201 CegarAbsIntRunner]: [2], [4], [9], [13], [15], [18], [29], [33], [47], [49], [50], [53], [54], [55], [56], [59], [97], [146], [147], [151], [152], [155], [156], [157] [2018-01-24 23:35:38,361 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:35:38,361 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown